The machine stops periodically without an error message.

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    Default The machine stops periodically without an error message.

    Hello everyone!
    In the spring, I bought a CNC USB controller Mk3/4 (4 axis). Everything worked perfectly for six months! Then the problems started.
    Very rarely - once a week, then once a day during the program, the machine stopped moving and turned off the spindle. The cooling was not turned off. There are no error messages.
    It was possible to start execution first or from a specific code location and there were no more stops. The situation could be repeated 5 times an hour, and then work for a week without such stops.
    Over the past three months, the situation has gradually worsened.

    Today, the machine stopped each time at about the same place at the beginning of the program. Manual control works, MDI commands are executed. There are no errors in the logs.
    Any ideas? Thanks!

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    Default Re: The machine stops periodically without an error message.

    Do you need to reconnect the controller when this happens?
    Could you try repeating this without using your spindle turned on? you would do it on safe height (air cut)...
    It is possible that EMI is to blame..



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    Default Re: The machine stops periodically without an error message.

    No, I don't need to reconnect the controller. I can run the program again from the beginning or from any line.
    The machine can work normally for a week or stop 5 times an hour.
    Do you believe this is EMI ? ))) okay, I'll run the test without turning on the spindle.
    In any case I want to see the error message to understand what is happening...
    (I have conducted a full EMI protection procedure...https://www.cnczone.com/forums/plane...00650-cnc.html)



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    Default Re: The machine stops periodically without an error message.

    I checked the operation of the machine without turning on the spindle. At first, the machine stopped at the very beginning 5% of the code.
    The second time passed 100% of the code. During this time, I turned the spindle on and off manually 10 times, the machine did not stop.
    The machine stopped many times in different places last day, it's better today!!!

    Conclusion - the problem is not in the spindle.
    Any ideas other than replacing the cable and computer?
    What can be configured incorrectly in the program?
    (I can give you remote access to the machine's computer).

    Attached Thumbnails Attached Thumbnails The machine stops periodically without an error message.-log-jpg  


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    Default Re: The machine stops periodically without an error message.

    When machine stops - is it in EStop?



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    Default Re: The machine stops periodically without an error message.

    No, it's not ESTOP!
    When "emergency stop" is triggered, the spindle and cooling are turned off, movement stops and "Estop" indicator (ES) lights up.

    My machine just stop - stops the movement and turns off the spindle. But cooling does not turn off.
    "Estop" indicator (ES) not light up.

    I can start the program again by clicking the start button (or select any line of code and run it from the specified position).
    The machine turn on a spindle and moves according to the program.
    Today the machine stopped 3 times in 6 hours of operation.
    What will happen tomorrow? (((



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    Default Re: The machine stops periodically without an error message.

    Export your profile and send me zip file. Also send me g-code that you use.
    To our support email.
    I'll try to replicate problem.

    Does machine stop in middle of g-code line or between two lines?
    Does machine decelerate to stop or stop is sudden?
    Is there something special about lines where machine stops or are they normal move lines?



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    Default Re: The machine stops periodically without an error message.

    Quote Originally Posted by PlanetCNC View Post
    Does machine stop in middle of g-code line or between two lines?
    Does machine decelerate to stop or stop is sudden?
    Is there something special about lines where machine stops or are they normal move lines?
    I cannot understand - the steps of the program very small movements.
    I make 3D shapes, they are slightly different. These are ordinary lines. Processing speed up to 6000 mm / min
    The mashine stops suddenly. Yesterday it was 6 times in 8 hours. Today there were 5 stops in different places in 10 minutes while executing ONE code.

    Maybe these stops are related to the emptying of the controller command buffer?

    Last edited by basilevscom; 10-21-2020 at 07:01 AM.


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    Default Re: The machine stops periodically without an error message.

    You have updated to the most recent version? There was some sort of buffering bug that was fixed about 2-3 months ago and this sounds a little like that problem. There is a thread somewhere here that discusses it. It seemd to mostly only affect really long gcode programs.



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    Default Re: The machine stops periodically without an error message.

    Hello, theRat, thank you!

    Yes, the latest version of the program is installed.
    I don't think my code is very large - about 25,000 lines and no more than 1 MB in size
    If this is a buffering issue, I want to see an error message anyway!

    I don't have any more ideas. I will change the PC and power supplies.
    I can replace the controller or put a program to monitoring of usb port and see what happens there... but it takes time and I don't have it!

    (I'm sorry, there is another machine nearby that works non-stop for 2 years. LinuxCNC, LPT port, low-cost old PC, low-cost motors and drivers TB6600...
    I assembled an expensive machine with feedback motors, with good hardware and software and... And I have machine stops several times a day!)



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    Default Re: The machine stops periodically without an error message.

    Quote Originally Posted by basilevscom View Post
    Hello everyone!
    In the spring, I bought a CNC USB controller Mk3/4 (4 axis). Everything worked perfectly for six months! Then the problems started.
    Very rarely - once a week, then once a day during the program.
    Any ideas? Thanks!
    ...this sounds like a loose wire somewhere....I would check every wire terminal and also quick plugs for bad connections



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    Default Re: The machine stops periodically without an error message.

    Hello, machinehop5, thanks for responding!

    I thought about it... I'll check everything again.
    If there is poor contact in the motors connectors, there will be skipped steps and motion disturbance, the same if the contact of the motor power supply connector is poor.
    But the program will not "see" it and will not stop. If we assume a bad connection of the USB connector, then most likely I will receive a message "controller disconnected"
    My machine stops moving and turns off the spindle (and sometimes stops the cooling) is synchronous with stopping the program and I think about some kind of logic error.



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The machine stops periodically without an error message.

The machine stops periodically without an error message.

The machine stops periodically without an error message.